What is better to use: Chef or Ansible?

Chef and Ansible are both popular configuration management tools, but each has its own strengths. Chef can be called robust and scalable, suitable for complex infrastructures and detailed configuration management. It follows the client-server architecture and is helpful in larger environments. Ansible is agentless and generally easier to set up, therefore much more suitable for simple configurations or smaller teams. You would go with Chef where detailed customization and scalability are required, whereas you would prefer Ansible when quick setup and straightforward automation of tasks are preferred.